Automatic oil and gas separating pump



NOV. 4 s

A. M. CHRISMAN ET AL AUTOMATIC OIL AND GAS SEPARATING PUMP Filed Feb.16, 1924 lowaetys.

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rammed Nov, 4, 1924.

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ALBERT M. CHBISMAN AND JACK E. WELLS, F PACIFICO, CALIFORNIA.

'AUTOMATIC OIL AND GAS SEPARATING) PUMP.

Appeati-on filed February 16, 1924. Serial N o. 693,373.

have invented certain new and useful Improvements in Automatic Oil andGas 'Separating Pumps, of which the following is a s ecification.

ur invention f relates to the class of pumps adapted for use in theproduction of p petroleum.

Our pump is especially applicable in wells where gas is present, in thatit is capable of automatically separating the oil and gas, saidseparation taking place at the point where the oil enters the pump, thegas being mainly excluded, thus relieving the pumping nstrumentalitiesof its presence, and resulting in distinct advantages as willhereinafter appear. In entitling and describing our invention in termsof oil and gas we are simply referring, for the sake of illustration, tothe petroleum producing art as the one in which the invention isimmediately 'and particularly applicable. It must be understood howeverthat our pump may be used in any situation and with any Huid-bodyaggregate comprising a liquid and a gaseous component undercircumstances where it will be of benefit to the pump to exclude the gastherefrom. It will also be understood that changes in the form andarrangement and in the details of our pump may be made without departingfrom the spirit of the invention as defined in the claims hereuntoappended. lVith this understanding we shall now describe our inventionin its npreferred and practical embodiment, reference being made to theaccompanying drawings in which- Figure 1 is a vertical section of thebarrel portion of our pump and its connections; the valve and plungerassembly being omitted.

Fig. 2 is a vertical section, enlarged and broken, of that portion ofour pump, which includes the valve and plunger assembly.

Fig. 3 is a vertical section of that portion of the pump in the regionin which the separation of the gas takes place, showing the point ofentrance of the oil to the annular space within the pump barrel.

Fig. 4 is -a vertical section of that portion of the pump in the regionin which the oil from the pump barrel enters the interior of the pump tobe directed to the plunger and valve assembly.

1 indicates a well and 2 the casing. 3 1s the pump barrel which at itsupper end is connected with the tubing-string 4 leading to the surface,by the coupling 5, Fig. 3. At the lower end the barrel 3 is connectedwith the tail-pipe 6, by the couping 7, the foot of the tail-pipe beingclosed,

lig. 4.

Within the pump barrel 3 are the liner members 8, usually as here shown,in a plurality of sections. These liners have an exterior diametersufficiently smaller than the interior diameter of the barrel 3 to leavean intervening space indicated by 9, and said liners are provided withexterior lugs 10 both circumferentially and linearly spaced, whichbearagainst the inner Wall of the barrel. The top liner as seen best. mFig. 3, has a collar 11 on its upper end, and the bottom liner as seenin Fig. 4, has a collar 11 on its lower end, said collars closelyfitting the barrel thus closing thel space 9 above and below, as inFig. 1. The liners are held in place between the couplings 5 and 7.

The barrel 3 near its upper end has the ports or openings 3', Figs. 1and 3 through which the well interior communicates with the upperportion of the space 9. The bottom liner has ports o r openings 8',Figs. 1 and 4, through which the space 9 at its lower portioncommunicates with the interior of the pump assembly and with the tailpipe 6. Referring now` to Fig. 2, 12 is the upper y or traveling-valveassembly, with which is connected the sucker rods 13, above, and thehollow plunger 14 below.

15 is the lower or standing-valve assembly which is seated at 16 in theusual manner in the barrel linings, and has extending downwardly from itthe anchor or suction pipe 17. The standing-valve assembly 15 is-connected above with the plunger 14 by means of the usual garbutt rod18 to enable said assembly to be pulled out with the other Working partsof the pump.

The operation of the device as indicated by the several arrows, is asfollows. The gas and liquid rise together in the well. At the upperports 3 the separation takes place, the gas passing on up in the well asseen in Fig. 3, while the liquid passes through said ports into thespace 9. In this space the liquid descends and passes'through the lowerports 8 as seen in Fig. 4 into .the interior of the'pump. lThence downin the tail pipe 6 and up through the anchor or suction pipe 17, F ig.4, the standing valve assembly 15, the plunger 14:, the traveling'valveassembly 1,2, and the tubing string l to the surface, Figs. 4, 2 and 3.The separation of the gas from the liquid isy due tothe downward coursewhich the liquid is compelled initially to take and occurs at the pointwhere the liquid enters the pump structure. The advantage gained is theassured and positive valve action, thus increasing the pumpingeiciency.-

In pumping equipments as usually employed in the production of o-ilwhere gas is present, the valve action is not positive, due

to the fact that the gas drawn through the bottom Valve often collectsin the plunger between the valves, thus preventing the Apump fromobtaining full capacity of displacement, since the gas will not pass outfrom the pump through the top lvalve until the pump creates a pressurebetween the, valves sufiicient to overcome the weight of the liquid.above. n

Moreover, the presence of gas also causes Valve chatter, which isdestructive tothe balls and seats )of ball-check valves, and oftentimesnecessitates the pulling of the Pump?. operation 1s costly, 1n additlonto wear and tear on equipment, and loss of production. Valve chatter,caused by gas also decreases the yeliiciency of the pump, due to thefact that the valve does not properlyclose during pump action.

.It will also be seen that by the separation of the gas and' oil bymeans of our pump emulsion is eliminated.

We claim: A

1. An oil and gasseparating pump comprising a closed barrel adapted forsuspension in a well; a liner itted concentrically within and spacedfrom said barrel, the space between. the barrel and liner being closedabove and below, said barrel having ports through which the wellcommunicates to renew said balls and seats. This with the upper-portionof said space, and

said liner having ports through which the lower portion of said spacecommunicateswith the interior of the liner; and pumpinginstrumentalities fitted within saidliner intermediate said. ports.

2. An oil and gas separating pump comprising a barrel adapted forsuspension in a well; a tail pipe carried by fthe lower end of thebarrel, said tail pipe having a closed foot; a liner fittedwnc'entricalljr within and spaced from said barrel, the space betweenthe barrel and liner being closed above and below, said barrel havingports Athrough prising a barrel adapted for suspension 1n a well, saidbarrel having an exterior space with an entrance from the well to itsupper ortion vand said s ace havin also an en-l. Y

trance from its lower portion into the interior of the barrel; andpumping instrumentalities within the barrel intermediate said entrances.

4:. An oil and gas separating pump comprising a barrel adapted forsuspension in a well, said barrelhaving an exterior cir? cumscribingspace with closed ends, said space having an entrance in its side to itsupper portion from theffwell, and said space having also an 'entrance inits side from its lower portion into the interior of the barrel; andpumping instrumentalities within the barrel intermediate said entrances.

In testimony whereof we have signed our names to this specification.

ALBERT M. CHRISMAN. JACK E. WELLS.

